VERBS
be | become
ADV
deadly, extremely, highly
PREP
to
Chocolate is poisonous to dogs, so pet owners must keep it away from their animals.
adj
Containing sufficient poison to be dangerous to touch or ingest.
While highly poisonous to dogs, this substance is completely harmless if ingested by humans.
Nor taint-worm ſhall infect the yeaning herds / Nor penny-graſs, nor ſpearwort's poiſ'nous leaf.
Of an animal such as a snake or spider, or parts of its body: producing a toxin intended for defensive or offensive use which is usually injected into an enemy or prey by biting or stinging; hence, of a bite or sting: injecting poison.
Poisonous snakes should only be handled by experienced professionals.
SERPENT … either that which is not poiſonous: or that which is counted poiſonous, having two long, hollow, moveable teeth, …
Negative, harmful.
He didn't want to end up like his grandfather, bitter and intractable, consumed in his hatred like an addict on haze — a poisonous attitude that would possess him all his remaining years.
Evidence that has been obtained as the result of an illegal act on the part of law enforcement personnel (such as an unlawful warrantless search, or continued questioning of a witness who has invoked the right of counsel), and which is ther
While highly poisonous to dogs, this substance is completely harmless if ingested by humans.
WiktionaryNor taint-worm ſhall infect the yeaning herds / Nor penny-graſs, nor ſpearwort's poiſ'nous leaf.
WiktionaryI had picked a mushroom so poisonous that particles of it, stuck to my fingers and accidentally swallowed, could have made me deathly ill, and a piece the size of my thumb could have killed me.
WiktionarySome snakes are poisonous.
Tatoeba · #33908We should keep away from the poisonous plants.
Tatoeba · #44662These substances are not poisonous in themselves.
Tatoeba · #55099i Register
In some senses, poisonous is marked as figuratively. Watch for register when choosing this word.